4 * Copyright (c) 2003-2008 Fabrice Bellard
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
31 /* Needed early for CONFIG_BSD etc. */
32 #include "config-host.h"
35 #include <sys/times.h>
39 #include <sys/ioctl.h>
40 #include <sys/resource.h>
41 #include <sys/socket.h>
42 #include <netinet/in.h>
44 #include <arpa/inet.h>
47 #include <sys/select.h>
50 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
58 #include <linux/rtc.h>
66 #include <sys/timeb.h>
68 #define getopt_long_only getopt_long
69 #define memalign(align, size) malloc(size)
72 #include "qemu-common.h"
78 #include "qemu-timer.h"
79 #include "audio/audio.h"
80 #include "migration.h"
81 #include "qemu_socket.h"
82 #include "qemu-queue.h"
83 #include "qemu-timer.h"
86 #include "qmp-commands.h"
90 #define SELF_ANNOUNCE_ROUNDS 5
93 #define ETH_P_RARP 0x8035
95 #define ARP_HTYPE_ETH 0x0001
96 #define ARP_PTYPE_IP 0x0800
97 #define ARP_OP_REQUEST_REV 0x3
99 static int announce_self_create(uint8_t *buf
,
102 /* Ethernet header. */
103 memset(buf
, 0xff, 6); /* destination MAC addr */
104 memcpy(buf
+ 6, mac_addr
, 6); /* source MAC addr */
105 *(uint16_t *)(buf
+ 12) = htons(ETH_P_RARP
); /* ethertype */
108 *(uint16_t *)(buf
+ 14) = htons(ARP_HTYPE_ETH
); /* hardware addr space */
109 *(uint16_t *)(buf
+ 16) = htons(ARP_PTYPE_IP
); /* protocol addr space */
110 *(buf
+ 18) = 6; /* hardware addr length (ethernet) */
111 *(buf
+ 19) = 4; /* protocol addr length (IPv4) */
112 *(uint16_t *)(buf
+ 20) = htons(ARP_OP_REQUEST_REV
); /* opcode */
113 memcpy(buf
+ 22, mac_addr
, 6); /* source hw addr */
114 memset(buf
+ 28, 0x00, 4); /* source protocol addr */
115 memcpy(buf
+ 32, mac_addr
, 6); /* target hw addr */
116 memset(buf
+ 38, 0x00, 4); /* target protocol addr */
118 /* Padding to get up to 60 bytes (ethernet min packet size, minus FCS). */
119 memset(buf
+ 42, 0x00, 18);
121 return 60; /* len (FCS will be added by hardware) */
124 static void qemu_announce_self_iter(NICState
*nic
, void *opaque
)
129 len
= announce_self_create(buf
, nic
->conf
->macaddr
.a
);
131 qemu_send_packet_raw(&nic
->nc
, buf
, len
);
135 static void qemu_announce_self_once(void *opaque
)
137 static int count
= SELF_ANNOUNCE_ROUNDS
;
138 QEMUTimer
*timer
= *(QEMUTimer
**)opaque
;
140 qemu_foreach_nic(qemu_announce_self_iter
, NULL
);
143 /* delay 50ms, 150ms, 250ms, ... */
144 qemu_mod_timer(timer
, qemu_get_clock_ms(rt_clock
) +
145 50 + (SELF_ANNOUNCE_ROUNDS
- count
- 1) * 100);
147 qemu_del_timer(timer
);
148 qemu_free_timer(timer
);
152 void qemu_announce_self(void)
154 static QEMUTimer
*timer
;
155 timer
= qemu_new_timer_ms(rt_clock
, qemu_announce_self_once
, &timer
);
156 qemu_announce_self_once(&timer
);
159 /***********************************************************/
160 /* savevm/loadvm support */
162 #define IO_BUF_SIZE 32768
165 const QEMUFileOps
*ops
;
169 int64_t buf_offset
; /* start of buffer when writing, end of buffer
172 int buf_size
; /* 0 when writing */
173 uint8_t buf
[IO_BUF_SIZE
];
178 typedef struct QEMUFileStdio
184 typedef struct QEMUFileSocket
190 static int socket_get_fd(void *opaque
)
192 QEMUFileSocket
*s
= opaque
;
197 static int socket_get_buffer(void *opaque
, uint8_t *buf
, int64_t pos
, int size
)
199 QEMUFileSocket
*s
= opaque
;
203 len
= qemu_recv(s
->fd
, buf
, size
, 0);
207 if (socket_error() == EAGAIN
) {
208 assert(qemu_in_coroutine());
209 qemu_coroutine_yield();
210 } else if (socket_error() != EINTR
) {
216 len
= -socket_error();
221 static int socket_close(void *opaque
)
223 QEMUFileSocket
*s
= opaque
;
229 static int stdio_get_fd(void *opaque
)
231 QEMUFileStdio
*s
= opaque
;
233 return fileno(s
->stdio_file
);
236 static int stdio_put_buffer(void *opaque
, const uint8_t *buf
, int64_t pos
, int size
)
238 QEMUFileStdio
*s
= opaque
;
239 return fwrite(buf
, 1, size
, s
->stdio_file
);
242 static int stdio_get_buffer(void *opaque
, uint8_t *buf
, int64_t pos
, int size
)
244 QEMUFileStdio
*s
= opaque
;
245 FILE *fp
= s
->stdio_file
;
250 bytes
= fread(buf
, 1, size
, fp
);
251 if (bytes
!= 0 || !ferror(fp
)) {
254 if (errno
== EAGAIN
) {
255 assert(qemu_in_coroutine());
256 qemu_coroutine_yield();
257 } else if (errno
!= EINTR
) {
264 static int stdio_pclose(void *opaque
)
266 QEMUFileStdio
*s
= opaque
;
268 ret
= pclose(s
->stdio_file
);
276 static int stdio_fclose(void *opaque
)
278 QEMUFileStdio
*s
= opaque
;
280 if (fclose(s
->stdio_file
) == EOF
) {
287 static const QEMUFileOps stdio_pipe_read_ops
= {
288 .get_fd
= stdio_get_fd
,
289 .get_buffer
= stdio_get_buffer
,
290 .close
= stdio_pclose
293 static const QEMUFileOps stdio_pipe_write_ops
= {
294 .get_fd
= stdio_get_fd
,
295 .put_buffer
= stdio_put_buffer
,
296 .close
= stdio_pclose
299 QEMUFile
*qemu_popen(FILE *stdio_file
, const char *mode
)
303 if (stdio_file
== NULL
|| mode
== NULL
|| (mode
[0] != 'r' && mode
[0] != 'w') || mode
[1] != 0) {
304 fprintf(stderr
, "qemu_popen: Argument validity check failed\n");
308 s
= g_malloc0(sizeof(QEMUFileStdio
));
310 s
->stdio_file
= stdio_file
;
313 s
->file
= qemu_fopen_ops(s
, &stdio_pipe_read_ops
);
315 s
->file
= qemu_fopen_ops(s
, &stdio_pipe_write_ops
);
320 QEMUFile
*qemu_popen_cmd(const char *command
, const char *mode
)
324 popen_file
= popen(command
, mode
);
325 if(popen_file
== NULL
) {
329 return qemu_popen(popen_file
, mode
);
332 static const QEMUFileOps stdio_file_read_ops
= {
333 .get_fd
= stdio_get_fd
,
334 .get_buffer
= stdio_get_buffer
,
335 .close
= stdio_fclose
338 static const QEMUFileOps stdio_file_write_ops
= {
339 .get_fd
= stdio_get_fd
,
340 .put_buffer
= stdio_put_buffer
,
341 .close
= stdio_fclose
344 QEMUFile
*qemu_fdopen(int fd
, const char *mode
)
349 (mode
[0] != 'r' && mode
[0] != 'w') ||
350 mode
[1] != 'b' || mode
[2] != 0) {
351 fprintf(stderr
, "qemu_fdopen: Argument validity check failed\n");
355 s
= g_malloc0(sizeof(QEMUFileStdio
));
356 s
->stdio_file
= fdopen(fd
, mode
);
361 s
->file
= qemu_fopen_ops(s
, &stdio_file_read_ops
);
363 s
->file
= qemu_fopen_ops(s
, &stdio_file_write_ops
);
372 static const QEMUFileOps socket_read_ops
= {
373 .get_fd
= socket_get_fd
,
374 .get_buffer
= socket_get_buffer
,
375 .close
= socket_close
378 QEMUFile
*qemu_fopen_socket(int fd
)
380 QEMUFileSocket
*s
= g_malloc0(sizeof(QEMUFileSocket
));
383 s
->file
= qemu_fopen_ops(s
, &socket_read_ops
);
387 QEMUFile
*qemu_fopen(const char *filename
, const char *mode
)
392 (mode
[0] != 'r' && mode
[0] != 'w') ||
393 mode
[1] != 'b' || mode
[2] != 0) {
394 fprintf(stderr
, "qemu_fopen: Argument validity check failed\n");
398 s
= g_malloc0(sizeof(QEMUFileStdio
));
400 s
->stdio_file
= fopen(filename
, mode
);
405 s
->file
= qemu_fopen_ops(s
, &stdio_file_write_ops
);
407 s
->file
= qemu_fopen_ops(s
, &stdio_file_read_ops
);
415 static int block_put_buffer(void *opaque
, const uint8_t *buf
,
416 int64_t pos
, int size
)
418 bdrv_save_vmstate(opaque
, buf
, pos
, size
);
422 static int block_get_buffer(void *opaque
, uint8_t *buf
, int64_t pos
, int size
)
424 return bdrv_load_vmstate(opaque
, buf
, pos
, size
);
427 static int bdrv_fclose(void *opaque
)
429 return bdrv_flush(opaque
);
432 static const QEMUFileOps bdrv_read_ops
= {
433 .get_buffer
= block_get_buffer
,
437 static const QEMUFileOps bdrv_write_ops
= {
438 .put_buffer
= block_put_buffer
,
442 static QEMUFile
*qemu_fopen_bdrv(BlockDriverState
*bs
, int is_writable
)
445 return qemu_fopen_ops(bs
, &bdrv_write_ops
);
446 return qemu_fopen_ops(bs
, &bdrv_read_ops
);
449 QEMUFile
*qemu_fopen_ops(void *opaque
, const QEMUFileOps
*ops
)
453 f
= g_malloc0(sizeof(QEMUFile
));
462 int qemu_file_get_error(QEMUFile
*f
)
464 return f
->last_error
;
467 static void qemu_file_set_error(QEMUFile
*f
, int ret
)
472 /** Flushes QEMUFile buffer
475 static int qemu_fflush(QEMUFile
*f
)
479 if (!f
->ops
->put_buffer
)
482 if (f
->is_write
&& f
->buf_index
> 0) {
483 ret
= f
->ops
->put_buffer(f
->opaque
, f
->buf
, f
->buf_offset
, f
->buf_index
);
485 f
->buf_offset
+= f
->buf_index
;
492 static void qemu_fill_buffer(QEMUFile
*f
)
497 if (!f
->ops
->get_buffer
)
503 pending
= f
->buf_size
- f
->buf_index
;
505 memmove(f
->buf
, f
->buf
+ f
->buf_index
, pending
);
508 f
->buf_size
= pending
;
510 len
= f
->ops
->get_buffer(f
->opaque
, f
->buf
+ pending
, f
->buf_offset
,
511 IO_BUF_SIZE
- pending
);
514 f
->buf_offset
+= len
;
515 } else if (len
== 0) {
516 qemu_file_set_error(f
, -EIO
);
517 } else if (len
!= -EAGAIN
)
518 qemu_file_set_error(f
, len
);
521 int qemu_get_fd(QEMUFile
*f
)
523 if (f
->ops
->get_fd
) {
524 return f
->ops
->get_fd(f
->opaque
);
531 * Returns negative error value if any error happened on previous operations or
532 * while closing the file. Returns 0 or positive number on success.
534 * The meaning of return value on success depends on the specific backend
537 int qemu_fclose(QEMUFile
*f
)
540 ret
= qemu_fflush(f
);
543 int ret2
= f
->ops
->close(f
->opaque
);
548 /* If any error was spotted before closing, we should report it
549 * instead of the close() return value.
558 int qemu_file_put_notify(QEMUFile
*f
)
560 return f
->ops
->put_buffer(f
->opaque
, NULL
, 0, 0);
563 void qemu_put_buffer(QEMUFile
*f
, const uint8_t *buf
, int size
)
571 if (f
->is_write
== 0 && f
->buf_index
> 0) {
573 "Attempted to write to buffer while read buffer is not empty\n");
578 l
= IO_BUF_SIZE
- f
->buf_index
;
581 memcpy(f
->buf
+ f
->buf_index
, buf
, l
);
586 if (f
->buf_index
>= IO_BUF_SIZE
) {
587 int ret
= qemu_fflush(f
);
589 qemu_file_set_error(f
, ret
);
596 void qemu_put_byte(QEMUFile
*f
, int v
)
602 if (f
->is_write
== 0 && f
->buf_index
> 0) {
604 "Attempted to write to buffer while read buffer is not empty\n");
608 f
->buf
[f
->buf_index
++] = v
;
610 if (f
->buf_index
>= IO_BUF_SIZE
) {
611 int ret
= qemu_fflush(f
);
613 qemu_file_set_error(f
, ret
);
618 static void qemu_file_skip(QEMUFile
*f
, int size
)
620 if (f
->buf_index
+ size
<= f
->buf_size
) {
621 f
->buf_index
+= size
;
625 static int qemu_peek_buffer(QEMUFile
*f
, uint8_t *buf
, int size
, size_t offset
)
634 index
= f
->buf_index
+ offset
;
635 pending
= f
->buf_size
- index
;
636 if (pending
< size
) {
638 index
= f
->buf_index
+ offset
;
639 pending
= f
->buf_size
- index
;
645 if (size
> pending
) {
649 memcpy(buf
, f
->buf
+ index
, size
);
653 int qemu_get_buffer(QEMUFile
*f
, uint8_t *buf
, int size
)
658 while (pending
> 0) {
661 res
= qemu_peek_buffer(f
, buf
, pending
, 0);
665 qemu_file_skip(f
, res
);
673 static int qemu_peek_byte(QEMUFile
*f
, int offset
)
675 int index
= f
->buf_index
+ offset
;
681 if (index
>= f
->buf_size
) {
683 index
= f
->buf_index
+ offset
;
684 if (index
>= f
->buf_size
) {
688 return f
->buf
[index
];
691 int qemu_get_byte(QEMUFile
*f
)
695 result
= qemu_peek_byte(f
, 0);
696 qemu_file_skip(f
, 1);
700 static int64_t qemu_ftell(QEMUFile
*f
)
702 return f
->buf_offset
- f
->buf_size
+ f
->buf_index
;
705 int qemu_file_rate_limit(QEMUFile
*f
)
707 if (f
->ops
->rate_limit
)
708 return f
->ops
->rate_limit(f
->opaque
);
713 int64_t qemu_file_get_rate_limit(QEMUFile
*f
)
715 if (f
->ops
->get_rate_limit
)
716 return f
->ops
->get_rate_limit(f
->opaque
);
721 int64_t qemu_file_set_rate_limit(QEMUFile
*f
, int64_t new_rate
)
723 /* any failed or completed migration keeps its state to allow probing of
724 * migration data, but has no associated file anymore */
725 if (f
&& f
->ops
->set_rate_limit
)
726 return f
->ops
->set_rate_limit(f
->opaque
, new_rate
);
731 void qemu_put_be16(QEMUFile
*f
, unsigned int v
)
733 qemu_put_byte(f
, v
>> 8);
737 void qemu_put_be32(QEMUFile
*f
, unsigned int v
)
739 qemu_put_byte(f
, v
>> 24);
740 qemu_put_byte(f
, v
>> 16);
741 qemu_put_byte(f
, v
>> 8);
745 void qemu_put_be64(QEMUFile
*f
, uint64_t v
)
747 qemu_put_be32(f
, v
>> 32);
751 unsigned int qemu_get_be16(QEMUFile
*f
)
754 v
= qemu_get_byte(f
) << 8;
755 v
|= qemu_get_byte(f
);
759 unsigned int qemu_get_be32(QEMUFile
*f
)
762 v
= qemu_get_byte(f
) << 24;
763 v
|= qemu_get_byte(f
) << 16;
764 v
|= qemu_get_byte(f
) << 8;
765 v
|= qemu_get_byte(f
);
769 uint64_t qemu_get_be64(QEMUFile
*f
)
772 v
= (uint64_t)qemu_get_be32(f
) << 32;
773 v
|= qemu_get_be32(f
);
780 void qemu_put_timer(QEMUFile
*f
, QEMUTimer
*ts
)
782 uint64_t expire_time
;
784 expire_time
= qemu_timer_expire_time_ns(ts
);
785 qemu_put_be64(f
, expire_time
);
788 void qemu_get_timer(QEMUFile
*f
, QEMUTimer
*ts
)
790 uint64_t expire_time
;
792 expire_time
= qemu_get_be64(f
);
793 if (expire_time
!= -1) {
794 qemu_mod_timer_ns(ts
, expire_time
);
803 static int get_bool(QEMUFile
*f
, void *pv
, size_t size
)
806 *v
= qemu_get_byte(f
);
810 static void put_bool(QEMUFile
*f
, void *pv
, size_t size
)
813 qemu_put_byte(f
, *v
);
816 const VMStateInfo vmstate_info_bool
= {
824 static int get_int8(QEMUFile
*f
, void *pv
, size_t size
)
831 static void put_int8(QEMUFile
*f
, void *pv
, size_t size
)
837 const VMStateInfo vmstate_info_int8
= {
845 static int get_int16(QEMUFile
*f
, void *pv
, size_t size
)
848 qemu_get_sbe16s(f
, v
);
852 static void put_int16(QEMUFile
*f
, void *pv
, size_t size
)
855 qemu_put_sbe16s(f
, v
);
858 const VMStateInfo vmstate_info_int16
= {
866 static int get_int32(QEMUFile
*f
, void *pv
, size_t size
)
869 qemu_get_sbe32s(f
, v
);
873 static void put_int32(QEMUFile
*f
, void *pv
, size_t size
)
876 qemu_put_sbe32s(f
, v
);
879 const VMStateInfo vmstate_info_int32
= {
885 /* 32 bit int. See that the received value is the same than the one
888 static int get_int32_equal(QEMUFile
*f
, void *pv
, size_t size
)
892 qemu_get_sbe32s(f
, &v2
);
899 const VMStateInfo vmstate_info_int32_equal
= {
900 .name
= "int32 equal",
901 .get
= get_int32_equal
,
905 /* 32 bit int. See that the received value is the less or the same
906 than the one in the field */
908 static int get_int32_le(QEMUFile
*f
, void *pv
, size_t size
)
912 qemu_get_sbe32s(f
, &new);
919 const VMStateInfo vmstate_info_int32_le
= {
920 .name
= "int32 equal",
927 static int get_int64(QEMUFile
*f
, void *pv
, size_t size
)
930 qemu_get_sbe64s(f
, v
);
934 static void put_int64(QEMUFile
*f
, void *pv
, size_t size
)
937 qemu_put_sbe64s(f
, v
);
940 const VMStateInfo vmstate_info_int64
= {
946 /* 8 bit unsigned int */
948 static int get_uint8(QEMUFile
*f
, void *pv
, size_t size
)
955 static void put_uint8(QEMUFile
*f
, void *pv
, size_t size
)
961 const VMStateInfo vmstate_info_uint8
= {
967 /* 16 bit unsigned int */
969 static int get_uint16(QEMUFile
*f
, void *pv
, size_t size
)
972 qemu_get_be16s(f
, v
);
976 static void put_uint16(QEMUFile
*f
, void *pv
, size_t size
)
979 qemu_put_be16s(f
, v
);
982 const VMStateInfo vmstate_info_uint16
= {
988 /* 32 bit unsigned int */
990 static int get_uint32(QEMUFile
*f
, void *pv
, size_t size
)
993 qemu_get_be32s(f
, v
);
997 static void put_uint32(QEMUFile
*f
, void *pv
, size_t size
)
1000 qemu_put_be32s(f
, v
);
1003 const VMStateInfo vmstate_info_uint32
= {
1009 /* 32 bit uint. See that the received value is the same than the one
1012 static int get_uint32_equal(QEMUFile
*f
, void *pv
, size_t size
)
1016 qemu_get_be32s(f
, &v2
);
1024 const VMStateInfo vmstate_info_uint32_equal
= {
1025 .name
= "uint32 equal",
1026 .get
= get_uint32_equal
,
1030 /* 64 bit unsigned int */
1032 static int get_uint64(QEMUFile
*f
, void *pv
, size_t size
)
1035 qemu_get_be64s(f
, v
);
1039 static void put_uint64(QEMUFile
*f
, void *pv
, size_t size
)
1042 qemu_put_be64s(f
, v
);
1045 const VMStateInfo vmstate_info_uint64
= {
1051 /* 8 bit int. See that the received value is the same than the one
1054 static int get_uint8_equal(QEMUFile
*f
, void *pv
, size_t size
)
1058 qemu_get_8s(f
, &v2
);
1065 const VMStateInfo vmstate_info_uint8_equal
= {
1066 .name
= "uint8 equal",
1067 .get
= get_uint8_equal
,
1071 /* 16 bit unsigned int int. See that the received value is the same than the one
1074 static int get_uint16_equal(QEMUFile
*f
, void *pv
, size_t size
)
1078 qemu_get_be16s(f
, &v2
);
1085 const VMStateInfo vmstate_info_uint16_equal
= {
1086 .name
= "uint16 equal",
1087 .get
= get_uint16_equal
,
1093 static int get_timer(QEMUFile
*f
, void *pv
, size_t size
)
1096 qemu_get_timer(f
, v
);
1100 static void put_timer(QEMUFile
*f
, void *pv
, size_t size
)
1103 qemu_put_timer(f
, v
);
1106 const VMStateInfo vmstate_info_timer
= {
1112 /* uint8_t buffers */
1114 static int get_buffer(QEMUFile
*f
, void *pv
, size_t size
)
1117 qemu_get_buffer(f
, v
, size
);
1121 static void put_buffer(QEMUFile
*f
, void *pv
, size_t size
)
1124 qemu_put_buffer(f
, v
, size
);
1127 const VMStateInfo vmstate_info_buffer
= {
1133 /* unused buffers: space that was used for some fields that are
1134 not useful anymore */
1136 static int get_unused_buffer(QEMUFile
*f
, void *pv
, size_t size
)
1142 block_len
= MIN(sizeof(buf
), size
);
1144 qemu_get_buffer(f
, buf
, block_len
);
1149 static void put_unused_buffer(QEMUFile
*f
, void *pv
, size_t size
)
1151 static const uint8_t buf
[1024];
1155 block_len
= MIN(sizeof(buf
), size
);
1157 qemu_put_buffer(f
, buf
, block_len
);
1161 const VMStateInfo vmstate_info_unused_buffer
= {
1162 .name
= "unused_buffer",
1163 .get
= get_unused_buffer
,
1164 .put
= put_unused_buffer
,
1167 /* bitmaps (as defined by bitmap.h). Note that size here is the size
1168 * of the bitmap in bits. The on-the-wire format of a bitmap is 64
1169 * bit words with the bits in big endian order. The in-memory format
1170 * is an array of 'unsigned long', which may be either 32 or 64 bits.
1172 /* This is the number of 64 bit words sent over the wire */
1173 #define BITS_TO_U64S(nr) DIV_ROUND_UP(nr, 64)
1174 static int get_bitmap(QEMUFile
*f
, void *pv
, size_t size
)
1176 unsigned long *bmp
= pv
;
1178 for (i
= 0; i
< BITS_TO_U64S(size
); i
++) {
1179 uint64_t w
= qemu_get_be64(f
);
1181 if (sizeof(unsigned long) == 4 && idx
< BITS_TO_LONGS(size
)) {
1182 bmp
[idx
++] = w
>> 32;
1188 static void put_bitmap(QEMUFile
*f
, void *pv
, size_t size
)
1190 unsigned long *bmp
= pv
;
1192 for (i
= 0; i
< BITS_TO_U64S(size
); i
++) {
1193 uint64_t w
= bmp
[idx
++];
1194 if (sizeof(unsigned long) == 4 && idx
< BITS_TO_LONGS(size
)) {
1195 w
|= ((uint64_t)bmp
[idx
++]) << 32;
1197 qemu_put_be64(f
, w
);
1201 const VMStateInfo vmstate_info_bitmap
= {
1207 typedef struct CompatEntry
{
1212 typedef struct SaveStateEntry
{
1213 QTAILQ_ENTRY(SaveStateEntry
) entry
;
1219 SaveVMHandlers
*ops
;
1220 const VMStateDescription
*vmsd
;
1222 CompatEntry
*compat
;
1228 static QTAILQ_HEAD(savevm_handlers
, SaveStateEntry
) savevm_handlers
=
1229 QTAILQ_HEAD_INITIALIZER(savevm_handlers
);
1230 static int global_section_id
;
1232 static int calculate_new_instance_id(const char *idstr
)
1235 int instance_id
= 0;
1237 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1238 if (strcmp(idstr
, se
->idstr
) == 0
1239 && instance_id
<= se
->instance_id
) {
1240 instance_id
= se
->instance_id
+ 1;
1246 static int calculate_compat_instance_id(const char *idstr
)
1249 int instance_id
= 0;
1251 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1255 if (strcmp(idstr
, se
->compat
->idstr
) == 0
1256 && instance_id
<= se
->compat
->instance_id
) {
1257 instance_id
= se
->compat
->instance_id
+ 1;
1263 /* TODO: Individual devices generally have very little idea about the rest
1264 of the system, so instance_id should be removed/replaced.
1265 Meanwhile pass -1 as instance_id if you do not already have a clearly
1266 distinguishing id for all instances of your device class. */
1267 int register_savevm_live(DeviceState
*dev
,
1271 SaveVMHandlers
*ops
,
1276 se
= g_malloc0(sizeof(SaveStateEntry
));
1277 se
->version_id
= version_id
;
1278 se
->section_id
= global_section_id
++;
1280 se
->opaque
= opaque
;
1283 /* if this is a live_savem then set is_ram */
1284 if (ops
->save_live_setup
!= NULL
) {
1289 char *id
= qdev_get_dev_path(dev
);
1291 pstrcpy(se
->idstr
, sizeof(se
->idstr
), id
);
1292 pstrcat(se
->idstr
, sizeof(se
->idstr
), "/");
1295 se
->compat
= g_malloc0(sizeof(CompatEntry
));
1296 pstrcpy(se
->compat
->idstr
, sizeof(se
->compat
->idstr
), idstr
);
1297 se
->compat
->instance_id
= instance_id
== -1 ?
1298 calculate_compat_instance_id(idstr
) : instance_id
;
1302 pstrcat(se
->idstr
, sizeof(se
->idstr
), idstr
);
1304 if (instance_id
== -1) {
1305 se
->instance_id
= calculate_new_instance_id(se
->idstr
);
1307 se
->instance_id
= instance_id
;
1309 assert(!se
->compat
|| se
->instance_id
== 0);
1310 /* add at the end of list */
1311 QTAILQ_INSERT_TAIL(&savevm_handlers
, se
, entry
);
1315 int register_savevm(DeviceState
*dev
,
1319 SaveStateHandler
*save_state
,
1320 LoadStateHandler
*load_state
,
1323 SaveVMHandlers
*ops
= g_malloc0(sizeof(SaveVMHandlers
));
1324 ops
->save_state
= save_state
;
1325 ops
->load_state
= load_state
;
1326 return register_savevm_live(dev
, idstr
, instance_id
, version_id
,
1330 void unregister_savevm(DeviceState
*dev
, const char *idstr
, void *opaque
)
1332 SaveStateEntry
*se
, *new_se
;
1336 char *path
= qdev_get_dev_path(dev
);
1338 pstrcpy(id
, sizeof(id
), path
);
1339 pstrcat(id
, sizeof(id
), "/");
1343 pstrcat(id
, sizeof(id
), idstr
);
1345 QTAILQ_FOREACH_SAFE(se
, &savevm_handlers
, entry
, new_se
) {
1346 if (strcmp(se
->idstr
, id
) == 0 && se
->opaque
== opaque
) {
1347 QTAILQ_REMOVE(&savevm_handlers
, se
, entry
);
1357 int vmstate_register_with_alias_id(DeviceState
*dev
, int instance_id
,
1358 const VMStateDescription
*vmsd
,
1359 void *opaque
, int alias_id
,
1360 int required_for_version
)
1364 /* If this triggers, alias support can be dropped for the vmsd. */
1365 assert(alias_id
== -1 || required_for_version
>= vmsd
->minimum_version_id
);
1367 se
= g_malloc0(sizeof(SaveStateEntry
));
1368 se
->version_id
= vmsd
->version_id
;
1369 se
->section_id
= global_section_id
++;
1370 se
->opaque
= opaque
;
1372 se
->alias_id
= alias_id
;
1373 se
->no_migrate
= vmsd
->unmigratable
;
1376 char *id
= qdev_get_dev_path(dev
);
1378 pstrcpy(se
->idstr
, sizeof(se
->idstr
), id
);
1379 pstrcat(se
->idstr
, sizeof(se
->idstr
), "/");
1382 se
->compat
= g_malloc0(sizeof(CompatEntry
));
1383 pstrcpy(se
->compat
->idstr
, sizeof(se
->compat
->idstr
), vmsd
->name
);
1384 se
->compat
->instance_id
= instance_id
== -1 ?
1385 calculate_compat_instance_id(vmsd
->name
) : instance_id
;
1389 pstrcat(se
->idstr
, sizeof(se
->idstr
), vmsd
->name
);
1391 if (instance_id
== -1) {
1392 se
->instance_id
= calculate_new_instance_id(se
->idstr
);
1394 se
->instance_id
= instance_id
;
1396 assert(!se
->compat
|| se
->instance_id
== 0);
1397 /* add at the end of list */
1398 QTAILQ_INSERT_TAIL(&savevm_handlers
, se
, entry
);
1402 int vmstate_register(DeviceState
*dev
, int instance_id
,
1403 const VMStateDescription
*vmsd
, void *opaque
)
1405 return vmstate_register_with_alias_id(dev
, instance_id
, vmsd
,
1409 void vmstate_unregister(DeviceState
*dev
, const VMStateDescription
*vmsd
,
1412 SaveStateEntry
*se
, *new_se
;
1414 QTAILQ_FOREACH_SAFE(se
, &savevm_handlers
, entry
, new_se
) {
1415 if (se
->vmsd
== vmsd
&& se
->opaque
== opaque
) {
1416 QTAILQ_REMOVE(&savevm_handlers
, se
, entry
);
1425 static void vmstate_subsection_save(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1427 static int vmstate_subsection_load(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1430 int vmstate_load_state(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1431 void *opaque
, int version_id
)
1433 VMStateField
*field
= vmsd
->fields
;
1436 if (version_id
> vmsd
->version_id
) {
1439 if (version_id
< vmsd
->minimum_version_id_old
) {
1442 if (version_id
< vmsd
->minimum_version_id
) {
1443 return vmsd
->load_state_old(f
, opaque
, version_id
);
1445 if (vmsd
->pre_load
) {
1446 int ret
= vmsd
->pre_load(opaque
);
1450 while(field
->name
) {
1451 if ((field
->field_exists
&&
1452 field
->field_exists(opaque
, version_id
)) ||
1453 (!field
->field_exists
&&
1454 field
->version_id
<= version_id
)) {
1455 void *base_addr
= opaque
+ field
->offset
;
1457 int size
= field
->size
;
1459 if (field
->flags
& VMS_VBUFFER
) {
1460 size
= *(int32_t *)(opaque
+field
->size_offset
);
1461 if (field
->flags
& VMS_MULTIPLY
) {
1462 size
*= field
->size
;
1465 if (field
->flags
& VMS_ARRAY
) {
1466 n_elems
= field
->num
;
1467 } else if (field
->flags
& VMS_VARRAY_INT32
) {
1468 n_elems
= *(int32_t *)(opaque
+field
->num_offset
);
1469 } else if (field
->flags
& VMS_VARRAY_UINT32
) {
1470 n_elems
= *(uint32_t *)(opaque
+field
->num_offset
);
1471 } else if (field
->flags
& VMS_VARRAY_UINT16
) {
1472 n_elems
= *(uint16_t *)(opaque
+field
->num_offset
);
1473 } else if (field
->flags
& VMS_VARRAY_UINT8
) {
1474 n_elems
= *(uint8_t *)(opaque
+field
->num_offset
);
1476 if (field
->flags
& VMS_POINTER
) {
1477 base_addr
= *(void **)base_addr
+ field
->start
;
1479 for (i
= 0; i
< n_elems
; i
++) {
1480 void *addr
= base_addr
+ size
* i
;
1482 if (field
->flags
& VMS_ARRAY_OF_POINTER
) {
1483 addr
= *(void **)addr
;
1485 if (field
->flags
& VMS_STRUCT
) {
1486 ret
= vmstate_load_state(f
, field
->vmsd
, addr
, field
->vmsd
->version_id
);
1488 ret
= field
->info
->get(f
, addr
, size
);
1498 ret
= vmstate_subsection_load(f
, vmsd
, opaque
);
1502 if (vmsd
->post_load
) {
1503 return vmsd
->post_load(opaque
, version_id
);
1508 void vmstate_save_state(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1511 VMStateField
*field
= vmsd
->fields
;
1513 if (vmsd
->pre_save
) {
1514 vmsd
->pre_save(opaque
);
1516 while(field
->name
) {
1517 if (!field
->field_exists
||
1518 field
->field_exists(opaque
, vmsd
->version_id
)) {
1519 void *base_addr
= opaque
+ field
->offset
;
1521 int size
= field
->size
;
1523 if (field
->flags
& VMS_VBUFFER
) {
1524 size
= *(int32_t *)(opaque
+field
->size_offset
);
1525 if (field
->flags
& VMS_MULTIPLY
) {
1526 size
*= field
->size
;
1529 if (field
->flags
& VMS_ARRAY
) {
1530 n_elems
= field
->num
;
1531 } else if (field
->flags
& VMS_VARRAY_INT32
) {
1532 n_elems
= *(int32_t *)(opaque
+field
->num_offset
);
1533 } else if (field
->flags
& VMS_VARRAY_UINT32
) {
1534 n_elems
= *(uint32_t *)(opaque
+field
->num_offset
);
1535 } else if (field
->flags
& VMS_VARRAY_UINT16
) {
1536 n_elems
= *(uint16_t *)(opaque
+field
->num_offset
);
1537 } else if (field
->flags
& VMS_VARRAY_UINT8
) {
1538 n_elems
= *(uint8_t *)(opaque
+field
->num_offset
);
1540 if (field
->flags
& VMS_POINTER
) {
1541 base_addr
= *(void **)base_addr
+ field
->start
;
1543 for (i
= 0; i
< n_elems
; i
++) {
1544 void *addr
= base_addr
+ size
* i
;
1546 if (field
->flags
& VMS_ARRAY_OF_POINTER
) {
1547 addr
= *(void **)addr
;
1549 if (field
->flags
& VMS_STRUCT
) {
1550 vmstate_save_state(f
, field
->vmsd
, addr
);
1552 field
->info
->put(f
, addr
, size
);
1558 vmstate_subsection_save(f
, vmsd
, opaque
);
1561 static int vmstate_load(QEMUFile
*f
, SaveStateEntry
*se
, int version_id
)
1563 if (!se
->vmsd
) { /* Old style */
1564 return se
->ops
->load_state(f
, se
->opaque
, version_id
);
1566 return vmstate_load_state(f
, se
->vmsd
, se
->opaque
, version_id
);
1569 static void vmstate_save(QEMUFile
*f
, SaveStateEntry
*se
)
1571 if (!se
->vmsd
) { /* Old style */
1572 se
->ops
->save_state(f
, se
->opaque
);
1575 vmstate_save_state(f
,se
->vmsd
, se
->opaque
);
1578 #define QEMU_VM_FILE_MAGIC 0x5145564d
1579 #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
1580 #define QEMU_VM_FILE_VERSION 0x00000003
1582 #define QEMU_VM_EOF 0x00
1583 #define QEMU_VM_SECTION_START 0x01
1584 #define QEMU_VM_SECTION_PART 0x02
1585 #define QEMU_VM_SECTION_END 0x03
1586 #define QEMU_VM_SECTION_FULL 0x04
1587 #define QEMU_VM_SUBSECTION 0x05
1589 bool qemu_savevm_state_blocked(Error
**errp
)
1593 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1594 if (se
->no_migrate
) {
1595 error_set(errp
, QERR_MIGRATION_NOT_SUPPORTED
, se
->idstr
);
1602 int qemu_savevm_state_begin(QEMUFile
*f
,
1603 const MigrationParams
*params
)
1608 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1609 if (!se
->ops
|| !se
->ops
->set_params
) {
1612 se
->ops
->set_params(params
, se
->opaque
);
1615 qemu_put_be32(f
, QEMU_VM_FILE_MAGIC
);
1616 qemu_put_be32(f
, QEMU_VM_FILE_VERSION
);
1618 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1621 if (!se
->ops
|| !se
->ops
->save_live_setup
) {
1624 if (se
->ops
&& se
->ops
->is_active
) {
1625 if (!se
->ops
->is_active(se
->opaque
)) {
1630 qemu_put_byte(f
, QEMU_VM_SECTION_START
);
1631 qemu_put_be32(f
, se
->section_id
);
1634 len
= strlen(se
->idstr
);
1635 qemu_put_byte(f
, len
);
1636 qemu_put_buffer(f
, (uint8_t *)se
->idstr
, len
);
1638 qemu_put_be32(f
, se
->instance_id
);
1639 qemu_put_be32(f
, se
->version_id
);
1641 ret
= se
->ops
->save_live_setup(f
, se
->opaque
);
1643 qemu_savevm_state_cancel(f
);
1647 ret
= qemu_file_get_error(f
);
1649 qemu_savevm_state_cancel(f
);
1657 * this function has three return values:
1658 * negative: there was one error, and we have -errno.
1659 * 0 : We haven't finished, caller have to go again
1660 * 1 : We have finished, we can go to complete phase
1662 int qemu_savevm_state_iterate(QEMUFile
*f
)
1667 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1668 if (!se
->ops
|| !se
->ops
->save_live_iterate
) {
1671 if (se
->ops
&& se
->ops
->is_active
) {
1672 if (!se
->ops
->is_active(se
->opaque
)) {
1676 if (qemu_file_rate_limit(f
)) {
1679 trace_savevm_section_start();
1681 qemu_put_byte(f
, QEMU_VM_SECTION_PART
);
1682 qemu_put_be32(f
, se
->section_id
);
1684 ret
= se
->ops
->save_live_iterate(f
, se
->opaque
);
1685 trace_savevm_section_end(se
->section_id
);
1688 /* Do not proceed to the next vmstate before this one reported
1689 completion of the current stage. This serializes the migration
1690 and reduces the probability that a faster changing state is
1691 synchronized over and over again. */
1698 ret
= qemu_file_get_error(f
);
1700 qemu_savevm_state_cancel(f
);
1705 int qemu_savevm_state_complete(QEMUFile
*f
)
1710 cpu_synchronize_all_states();
1712 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1713 if (!se
->ops
|| !se
->ops
->save_live_complete
) {
1716 if (se
->ops
&& se
->ops
->is_active
) {
1717 if (!se
->ops
->is_active(se
->opaque
)) {
1721 trace_savevm_section_start();
1723 qemu_put_byte(f
, QEMU_VM_SECTION_END
);
1724 qemu_put_be32(f
, se
->section_id
);
1726 ret
= se
->ops
->save_live_complete(f
, se
->opaque
);
1727 trace_savevm_section_end(se
->section_id
);
1733 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1736 if ((!se
->ops
|| !se
->ops
->save_state
) && !se
->vmsd
) {
1739 trace_savevm_section_start();
1741 qemu_put_byte(f
, QEMU_VM_SECTION_FULL
);
1742 qemu_put_be32(f
, se
->section_id
);
1745 len
= strlen(se
->idstr
);
1746 qemu_put_byte(f
, len
);
1747 qemu_put_buffer(f
, (uint8_t *)se
->idstr
, len
);
1749 qemu_put_be32(f
, se
->instance_id
);
1750 qemu_put_be32(f
, se
->version_id
);
1752 vmstate_save(f
, se
);
1753 trace_savevm_section_end(se
->section_id
);
1756 qemu_put_byte(f
, QEMU_VM_EOF
);
1758 return qemu_file_get_error(f
);
1761 void qemu_savevm_state_cancel(QEMUFile
*f
)
1765 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1766 if (se
->ops
&& se
->ops
->cancel
) {
1767 se
->ops
->cancel(se
->opaque
);
1772 static int qemu_savevm_state(QEMUFile
*f
)
1775 MigrationParams params
= {
1780 if (qemu_savevm_state_blocked(NULL
)) {
1785 ret
= qemu_savevm_state_begin(f
, ¶ms
);
1790 ret
= qemu_savevm_state_iterate(f
);
1795 ret
= qemu_savevm_state_complete(f
);
1799 ret
= qemu_file_get_error(f
);
1805 static int qemu_save_device_state(QEMUFile
*f
)
1809 qemu_put_be32(f
, QEMU_VM_FILE_MAGIC
);
1810 qemu_put_be32(f
, QEMU_VM_FILE_VERSION
);
1812 cpu_synchronize_all_states();
1814 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1820 if ((!se
->ops
|| !se
->ops
->save_state
) && !se
->vmsd
) {
1825 qemu_put_byte(f
, QEMU_VM_SECTION_FULL
);
1826 qemu_put_be32(f
, se
->section_id
);
1829 len
= strlen(se
->idstr
);
1830 qemu_put_byte(f
, len
);
1831 qemu_put_buffer(f
, (uint8_t *)se
->idstr
, len
);
1833 qemu_put_be32(f
, se
->instance_id
);
1834 qemu_put_be32(f
, se
->version_id
);
1836 vmstate_save(f
, se
);
1839 qemu_put_byte(f
, QEMU_VM_EOF
);
1841 return qemu_file_get_error(f
);
1844 static SaveStateEntry
*find_se(const char *idstr
, int instance_id
)
1848 QTAILQ_FOREACH(se
, &savevm_handlers
, entry
) {
1849 if (!strcmp(se
->idstr
, idstr
) &&
1850 (instance_id
== se
->instance_id
||
1851 instance_id
== se
->alias_id
))
1853 /* Migrating from an older version? */
1854 if (strstr(se
->idstr
, idstr
) && se
->compat
) {
1855 if (!strcmp(se
->compat
->idstr
, idstr
) &&
1856 (instance_id
== se
->compat
->instance_id
||
1857 instance_id
== se
->alias_id
))
1864 static const VMStateDescription
*vmstate_get_subsection(const VMStateSubsection
*sub
, char *idstr
)
1866 while(sub
&& sub
->needed
) {
1867 if (strcmp(idstr
, sub
->vmsd
->name
) == 0) {
1875 static int vmstate_subsection_load(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1878 while (qemu_peek_byte(f
, 0) == QEMU_VM_SUBSECTION
) {
1881 uint8_t version_id
, len
, size
;
1882 const VMStateDescription
*sub_vmsd
;
1884 len
= qemu_peek_byte(f
, 1);
1885 if (len
< strlen(vmsd
->name
) + 1) {
1886 /* subsection name has be be "section_name/a" */
1889 size
= qemu_peek_buffer(f
, (uint8_t *)idstr
, len
, 2);
1895 if (strncmp(vmsd
->name
, idstr
, strlen(vmsd
->name
)) != 0) {
1896 /* it don't have a valid subsection name */
1899 sub_vmsd
= vmstate_get_subsection(vmsd
->subsections
, idstr
);
1900 if (sub_vmsd
== NULL
) {
1903 qemu_file_skip(f
, 1); /* subsection */
1904 qemu_file_skip(f
, 1); /* len */
1905 qemu_file_skip(f
, len
); /* idstr */
1906 version_id
= qemu_get_be32(f
);
1908 ret
= vmstate_load_state(f
, sub_vmsd
, opaque
, version_id
);
1916 static void vmstate_subsection_save(QEMUFile
*f
, const VMStateDescription
*vmsd
,
1919 const VMStateSubsection
*sub
= vmsd
->subsections
;
1921 while (sub
&& sub
->needed
) {
1922 if (sub
->needed(opaque
)) {
1923 const VMStateDescription
*vmsd
= sub
->vmsd
;
1926 qemu_put_byte(f
, QEMU_VM_SUBSECTION
);
1927 len
= strlen(vmsd
->name
);
1928 qemu_put_byte(f
, len
);
1929 qemu_put_buffer(f
, (uint8_t *)vmsd
->name
, len
);
1930 qemu_put_be32(f
, vmsd
->version_id
);
1931 vmstate_save_state(f
, vmsd
, opaque
);
1937 typedef struct LoadStateEntry
{
1938 QLIST_ENTRY(LoadStateEntry
) entry
;
1944 int qemu_loadvm_state(QEMUFile
*f
)
1946 QLIST_HEAD(, LoadStateEntry
) loadvm_handlers
=
1947 QLIST_HEAD_INITIALIZER(loadvm_handlers
);
1948 LoadStateEntry
*le
, *new_le
;
1949 uint8_t section_type
;
1953 if (qemu_savevm_state_blocked(NULL
)) {
1957 v
= qemu_get_be32(f
);
1958 if (v
!= QEMU_VM_FILE_MAGIC
)
1961 v
= qemu_get_be32(f
);
1962 if (v
== QEMU_VM_FILE_VERSION_COMPAT
) {
1963 fprintf(stderr
, "SaveVM v2 format is obsolete and don't work anymore\n");
1966 if (v
!= QEMU_VM_FILE_VERSION
)
1969 while ((section_type
= qemu_get_byte(f
)) != QEMU_VM_EOF
) {
1970 uint32_t instance_id
, version_id
, section_id
;
1975 switch (section_type
) {
1976 case QEMU_VM_SECTION_START
:
1977 case QEMU_VM_SECTION_FULL
:
1978 /* Read section start */
1979 section_id
= qemu_get_be32(f
);
1980 len
= qemu_get_byte(f
);
1981 qemu_get_buffer(f
, (uint8_t *)idstr
, len
);
1983 instance_id
= qemu_get_be32(f
);
1984 version_id
= qemu_get_be32(f
);
1986 /* Find savevm section */
1987 se
= find_se(idstr
, instance_id
);
1989 fprintf(stderr
, "Unknown savevm section or instance '%s' %d\n", idstr
, instance_id
);
1994 /* Validate version */
1995 if (version_id
> se
->version_id
) {
1996 fprintf(stderr
, "savevm: unsupported version %d for '%s' v%d\n",
1997 version_id
, idstr
, se
->version_id
);
2003 le
= g_malloc0(sizeof(*le
));
2006 le
->section_id
= section_id
;
2007 le
->version_id
= version_id
;
2008 QLIST_INSERT_HEAD(&loadvm_handlers
, le
, entry
);
2010 ret
= vmstate_load(f
, le
->se
, le
->version_id
);
2012 fprintf(stderr
, "qemu: warning: error while loading state for instance 0x%x of device '%s'\n",
2013 instance_id
, idstr
);
2017 case QEMU_VM_SECTION_PART
:
2018 case QEMU_VM_SECTION_END
:
2019 section_id
= qemu_get_be32(f
);
2021 QLIST_FOREACH(le
, &loadvm_handlers
, entry
) {
2022 if (le
->section_id
== section_id
) {
2027 fprintf(stderr
, "Unknown savevm section %d\n", section_id
);
2032 ret
= vmstate_load(f
, le
->se
, le
->version_id
);
2034 fprintf(stderr
, "qemu: warning: error while loading state section id %d\n",
2040 fprintf(stderr
, "Unknown savevm section type %d\n", section_type
);
2046 cpu_synchronize_all_post_init();
2051 QLIST_FOREACH_SAFE(le
, &loadvm_handlers
, entry
, new_le
) {
2052 QLIST_REMOVE(le
, entry
);
2057 ret
= qemu_file_get_error(f
);
2063 static int bdrv_snapshot_find(BlockDriverState
*bs
, QEMUSnapshotInfo
*sn_info
,
2066 QEMUSnapshotInfo
*sn_tab
, *sn
;
2070 nb_sns
= bdrv_snapshot_list(bs
, &sn_tab
);
2073 for(i
= 0; i
< nb_sns
; i
++) {
2075 if (!strcmp(sn
->id_str
, name
) || !strcmp(sn
->name
, name
)) {
2086 * Deletes snapshots of a given name in all opened images.
2088 static int del_existing_snapshots(Monitor
*mon
, const char *name
)
2090 BlockDriverState
*bs
;
2091 QEMUSnapshotInfo sn1
, *snapshot
= &sn1
;
2095 while ((bs
= bdrv_next(bs
))) {
2096 if (bdrv_can_snapshot(bs
) &&
2097 bdrv_snapshot_find(bs
, snapshot
, name
) >= 0)
2099 ret
= bdrv_snapshot_delete(bs
, name
);
2102 "Error while deleting snapshot on '%s'\n",
2103 bdrv_get_device_name(bs
));
2112 void do_savevm(Monitor
*mon
, const QDict
*qdict
)
2114 BlockDriverState
*bs
, *bs1
;
2115 QEMUSnapshotInfo sn1
, *sn
= &sn1
, old_sn1
, *old_sn
= &old_sn1
;
2118 int saved_vm_running
;
2119 uint64_t vm_state_size
;
2127 const char *name
= qdict_get_try_str(qdict
, "name");
2129 /* Verify if there is a device that doesn't support snapshots and is writable */
2131 while ((bs
= bdrv_next(bs
))) {
2133 if (!bdrv_is_inserted(bs
) || bdrv_is_read_only(bs
)) {
2137 if (!bdrv_can_snapshot(bs
)) {
2138 monitor_printf(mon
, "Device '%s' is writable but does not support snapshots.\n",
2139 bdrv_get_device_name(bs
));
2144 bs
= bdrv_snapshots();
2146 monitor_printf(mon
, "No block device can accept snapshots\n");
2150 saved_vm_running
= runstate_is_running();
2151 vm_stop(RUN_STATE_SAVE_VM
);
2153 memset(sn
, 0, sizeof(*sn
));
2155 /* fill auxiliary fields */
2158 sn
->date_sec
= tb
.time
;
2159 sn
->date_nsec
= tb
.millitm
* 1000000;
2161 gettimeofday(&tv
, NULL
);
2162 sn
->date_sec
= tv
.tv_sec
;
2163 sn
->date_nsec
= tv
.tv_usec
* 1000;
2165 sn
->vm_clock_nsec
= qemu_get_clock_ns(vm_clock
);
2168 ret
= bdrv_snapshot_find(bs
, old_sn
, name
);
2170 pstrcpy(sn
->name
, sizeof(sn
->name
), old_sn
->name
);
2171 pstrcpy(sn
->id_str
, sizeof(sn
->id_str
), old_sn
->id_str
);
2173 pstrcpy(sn
->name
, sizeof(sn
->name
), name
);
2178 ptm
= localtime(&t
);
2179 strftime(sn
->name
, sizeof(sn
->name
), "vm-%Y%m%d%H%M%S", ptm
);
2181 /* cast below needed for OpenBSD where tv_sec is still 'long' */
2182 localtime_r((const time_t *)&tv
.tv_sec
, &tm
);
2183 strftime(sn
->name
, sizeof(sn
->name
), "vm-%Y%m%d%H%M%S", &tm
);
2187 /* Delete old snapshots of the same name */
2188 if (name
&& del_existing_snapshots(mon
, name
) < 0) {
2192 /* save the VM state */
2193 f
= qemu_fopen_bdrv(bs
, 1);
2195 monitor_printf(mon
, "Could not open VM state file\n");
2198 ret
= qemu_savevm_state(f
);
2199 vm_state_size
= qemu_ftell(f
);
2202 monitor_printf(mon
, "Error %d while writing VM\n", ret
);
2206 /* create the snapshots */
2209 while ((bs1
= bdrv_next(bs1
))) {
2210 if (bdrv_can_snapshot(bs1
)) {
2211 /* Write VM state size only to the image that contains the state */
2212 sn
->vm_state_size
= (bs
== bs1
? vm_state_size
: 0);
2213 ret
= bdrv_snapshot_create(bs1
, sn
);
2215 monitor_printf(mon
, "Error while creating snapshot on '%s'\n",
2216 bdrv_get_device_name(bs1
));
2222 if (saved_vm_running
)
2226 void qmp_xen_save_devices_state(const char *filename
, Error
**errp
)
2229 int saved_vm_running
;
2232 saved_vm_running
= runstate_is_running();
2233 vm_stop(RUN_STATE_SAVE_VM
);
2235 f
= qemu_fopen(filename
, "wb");
2237 error_set(errp
, QERR_OPEN_FILE_FAILED
, filename
);
2240 ret
= qemu_save_device_state(f
);
2243 error_set(errp
, QERR_IO_ERROR
);
2247 if (saved_vm_running
)
2251 int load_vmstate(const char *name
)
2253 BlockDriverState
*bs
, *bs_vm_state
;
2254 QEMUSnapshotInfo sn
;
2258 bs_vm_state
= bdrv_snapshots();
2260 error_report("No block device supports snapshots");
2264 /* Don't even try to load empty VM states */
2265 ret
= bdrv_snapshot_find(bs_vm_state
, &sn
, name
);
2268 } else if (sn
.vm_state_size
== 0) {
2269 error_report("This is a disk-only snapshot. Revert to it offline "
2274 /* Verify if there is any device that doesn't support snapshots and is
2275 writable and check if the requested snapshot is available too. */
2277 while ((bs
= bdrv_next(bs
))) {
2279 if (!bdrv_is_inserted(bs
) || bdrv_is_read_only(bs
)) {
2283 if (!bdrv_can_snapshot(bs
)) {
2284 error_report("Device '%s' is writable but does not support snapshots.",
2285 bdrv_get_device_name(bs
));
2289 ret
= bdrv_snapshot_find(bs
, &sn
, name
);
2291 error_report("Device '%s' does not have the requested snapshot '%s'",
2292 bdrv_get_device_name(bs
), name
);
2297 /* Flush all IO requests so they don't interfere with the new state. */
2301 while ((bs
= bdrv_next(bs
))) {
2302 if (bdrv_can_snapshot(bs
)) {
2303 ret
= bdrv_snapshot_goto(bs
, name
);
2305 error_report("Error %d while activating snapshot '%s' on '%s'",
2306 ret
, name
, bdrv_get_device_name(bs
));
2312 /* restore the VM state */
2313 f
= qemu_fopen_bdrv(bs_vm_state
, 0);
2315 error_report("Could not open VM state file");
2319 qemu_system_reset(VMRESET_SILENT
);
2320 ret
= qemu_loadvm_state(f
);
2324 error_report("Error %d while loading VM state", ret
);
2331 void do_delvm(Monitor
*mon
, const QDict
*qdict
)
2333 BlockDriverState
*bs
, *bs1
;
2335 const char *name
= qdict_get_str(qdict
, "name");
2337 bs
= bdrv_snapshots();
2339 monitor_printf(mon
, "No block device supports snapshots\n");
2344 while ((bs1
= bdrv_next(bs1
))) {
2345 if (bdrv_can_snapshot(bs1
)) {
2346 ret
= bdrv_snapshot_delete(bs1
, name
);
2348 if (ret
== -ENOTSUP
)
2350 "Snapshots not supported on device '%s'\n",
2351 bdrv_get_device_name(bs1
));
2353 monitor_printf(mon
, "Error %d while deleting snapshot on "
2354 "'%s'\n", ret
, bdrv_get_device_name(bs1
));
2360 void do_info_snapshots(Monitor
*mon
)
2362 BlockDriverState
*bs
, *bs1
;
2363 QEMUSnapshotInfo
*sn_tab
, *sn
, s
, *sn_info
= &s
;
2364 int nb_sns
, i
, ret
, available
;
2366 int *available_snapshots
;
2369 bs
= bdrv_snapshots();
2371 monitor_printf(mon
, "No available block device supports snapshots\n");
2375 nb_sns
= bdrv_snapshot_list(bs
, &sn_tab
);
2377 monitor_printf(mon
, "bdrv_snapshot_list: error %d\n", nb_sns
);
2382 monitor_printf(mon
, "There is no snapshot available.\n");
2386 available_snapshots
= g_malloc0(sizeof(int) * nb_sns
);
2388 for (i
= 0; i
< nb_sns
; i
++) {
2393 while ((bs1
= bdrv_next(bs1
))) {
2394 if (bdrv_can_snapshot(bs1
) && bs1
!= bs
) {
2395 ret
= bdrv_snapshot_find(bs1
, sn_info
, sn
->id_str
);
2404 available_snapshots
[total
] = i
;
2410 monitor_printf(mon
, "%s\n", bdrv_snapshot_dump(buf
, sizeof(buf
), NULL
));
2411 for (i
= 0; i
< total
; i
++) {
2412 sn
= &sn_tab
[available_snapshots
[i
]];
2413 monitor_printf(mon
, "%s\n", bdrv_snapshot_dump(buf
, sizeof(buf
), sn
));
2416 monitor_printf(mon
, "There is no suitable snapshot available\n");
2420 g_free(available_snapshots
);
2424 void vmstate_register_ram(MemoryRegion
*mr
, DeviceState
*dev
)
2426 qemu_ram_set_idstr(memory_region_get_ram_addr(mr
) & TARGET_PAGE_MASK
,
2427 memory_region_name(mr
), dev
);
2430 void vmstate_unregister_ram(MemoryRegion
*mr
, DeviceState
*dev
)
2432 /* Nothing do to while the implementation is in RAMBlock */
2435 void vmstate_register_ram_global(MemoryRegion
*mr
)
2437 vmstate_register_ram(mr
, NULL
);
2446 nzrun = length byte...
2448 length = uleb128 encoded integer
2450 int xbzrle_encode_buffer(uint8_t *old_buf
, uint8_t *new_buf
, int slen
,
2451 uint8_t *dst
, int dlen
)
2453 uint32_t zrun_len
= 0, nzrun_len
= 0;
2456 uint8_t *nzrun_start
= NULL
;
2458 g_assert(!(((uintptr_t)old_buf
| (uintptr_t)new_buf
| slen
) %
2467 /* not aligned to sizeof(long) */
2468 res
= (slen
- i
) % sizeof(long);
2469 while (res
&& old_buf
[i
] == new_buf
[i
]) {
2475 /* word at a time for speed */
2478 (*(long *)(old_buf
+ i
)) == (*(long *)(new_buf
+ i
))) {
2480 zrun_len
+= sizeof(long);
2483 /* go over the rest */
2484 while (i
< slen
&& old_buf
[i
] == new_buf
[i
]) {
2490 /* buffer unchanged */
2491 if (zrun_len
== slen
) {
2495 /* skip last zero run */
2500 d
+= uleb128_encode_small(dst
+ d
, zrun_len
);
2503 nzrun_start
= new_buf
+ i
;
2509 /* not aligned to sizeof(long) */
2510 res
= (slen
- i
) % sizeof(long);
2511 while (res
&& old_buf
[i
] != new_buf
[i
]) {
2517 /* word at a time for speed, use of 32-bit long okay */
2519 /* truncation to 32-bit long okay */
2520 long mask
= (long)0x0101010101010101ULL
;
2522 xor = *(long *)(old_buf
+ i
) ^ *(long *)(new_buf
+ i
);
2523 if ((xor - mask
) & ~xor & (mask
<< 7)) {
2524 /* found the end of an nzrun within the current long */
2525 while (old_buf
[i
] != new_buf
[i
]) {
2532 nzrun_len
+= sizeof(long);
2537 d
+= uleb128_encode_small(dst
+ d
, nzrun_len
);
2539 if (d
+ nzrun_len
> dlen
) {
2542 memcpy(dst
+ d
, nzrun_start
, nzrun_len
);
2550 int xbzrle_decode_buffer(uint8_t *src
, int slen
, uint8_t *dst
, int dlen
)
2559 if ((slen
- i
) < 2) {
2563 ret
= uleb128_decode_small(src
+ i
, &count
);
2564 if (ret
< 0 || (i
&& !count
)) {
2576 if ((slen
- i
) < 2) {
2580 ret
= uleb128_decode_small(src
+ i
, &count
);
2581 if (ret
< 0 || !count
) {
2587 if (d
+ count
> dlen
|| i
+ count
> slen
) {
2591 memcpy(dst
+ d
, src
+ i
, count
);